The end of the Civil War in America represented a great change for the political, economic, and social environment of the American states. It marked the start of a certain number of changes that would favor on the one hand, the development of the United States into becoming the most important force on the political stage by the end of the Second World War, and on the other hand, it contributed to the emergence of a different approach to the social and economic issues that would affect the population in the decades following the Civil War. In this context, the Knights of Labor played an important role in defining the position of the working class and in turn, determined the establishment of a reaction that would become traditional in America towards the organization of workers and the role of the state in economic affairs.
             In order to have a comprehensive image of the role the Knights of Labor played in the history of the United States it is important to place them in a historical background, more precisely the end of the Civil War and the Reconstruction period. Also, the birth and evolution of the organization is as important because it offers a perspective on the way in which the society reacted to the strains of the Reconstruction and the pressures of the increasing pressures of the workers, both native ones and immigrants. Although the influence of the organization cannot be considered as having been widely spread, their achievements are worthy of pointing out because, in their activities, they represented a non violent voice for the unskilled and unappreciated workers from the areas of Philadelphia and Chicago. Finally, taking into account the wide range of pressures that began to emerge as the century neared its end the influence of the Knights of Labor wore out. Nonetheless, it is important to consider the ways in which this event took place in order to have a view on the emerging political, economic and social trends of the f...